Answer:
A.
Step-by-step explanation:
x < -6 means that x is lesser than -6. Thus, C and D are wrong. A filled up dot means that -6 is also a possible number for x, but here it says that x is lesser than -6, so it cannot be -6 itself. Thus, B with the filled up dot is also wrong.
do u know the awnser?
3x^3+4x^2-15x-20
x^2(3x+4)-5(3x-4)
(3x+4)(x^2-5)
